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United States Patent | 5,256,884 |
Buck ,   et al. | October 26, 1993 |
A method and apparatus for the alignment of paper stacks in a printing press provides essentially uninterrupted printing through the transfer of supply of sheets of paper from a first stack of papers to a second stack of papers by reducing mechanical strain in the control and operation of the sheet feeder of the printing press.
Inventors: | Buck; Helmut (Schriesheim, DE); Bergann; Ludwig (Berlin, DE) |
Assignee: | Heidelberger Druckmaschinen A.G. (Heidelberg, DE) |
Appl. No.: | 857517 |
Filed: | March 25, 1992 |
Mar 25, 1991[DE] | 4110187 | |
Sep 06, 1991[DE] | 4129702 |
Current U.S. Class: | 250/559.31; 356/3.05 |
Intern'l Class: | G01N 021/86 |
Field of Search: | 250/560,561,201.4,548 356/1,4,375,376 |
4266875 | May., 1981 | Bodlaj | 356/1. |
4839526 | Jun., 1989 | Pryor | 250/561. |
4847510 | Jul., 1989 | Douglas | 250/561. |
4874956 | Oct., 1989 | Kato et al. | 250/561. |
4916302 | Apr., 1990 | Sorimachi | 250/561. |
Foreign Patent Documents | |||
0405423 | Jan., 1991 | EP. | |
2219709 | Dec., 1989 | GB. |